стать vs за+

[lexabear.livejournal.com]

Is there a semantic difference between стать + inf (meaning "begin to...") and verbs with a за- prefix? Is стать just used for verbs that don't have a regular за- form?

Russian Tastature and express of ó (a or o?)

[disminuya.livejournal.com]

I`ve got a question about writing russian with an romanian/german tastature (I have got both).
Is it difficault for you to notice the letters, if you don`t see them?

What`s about o, ó etc.
I don`t really know, when I have to say "a" and when "o", when there is written an "o" (for example она, and so on).